Elsevier

Physica B+C

Volume 120, Issues 1–3, May 1983, Pages 275-279
Physica B+C

Phase transitions
Neutron diffraction and scattering study on MxWO3 (M = Rb and K)

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Abstract

To study the relationship between the lattice instability and the superconductivity of nonstoichiometric hexagonal tungsten bronze, MxWO3, neutron diffraction and scattering studies were made. Two types of the structural phase transitions were observed. One is associated with the distortion of the corner linked WO6 octahedra. The other is associated with ordering of the M atoms which partially fill the sites in the WO3 cage. A long period modulation of the structure appears for some values of x at low temperature. The discussion on the x dependence of the superconducting transition temperature is presented.

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